Core.



C. F. AIVIES.

CORE.

APPLICATION FILED MAR, 11.1918.

1 ,2? 9 ,214. Patented Sept. 17,1918.

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Patented Sept. 17, 1918..

3 SHEETSSHEET 2.

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ence numerals indicate like CLARENCE F. AMES, 0F AKRON, OHIO.

CORE.

Specification of Letters Patent. I Patentedsept. 1'7, 1918.

Application filedMarch 11, 1918. Serial No. 221,728.

Toall whom it may concern 1' Be it known that I, CLARENCE F AMES,

a citizen of the United States, residing at Akron, in the county of Summit andState of Ohio, have invented new and useful Improvements in Cores, of which'the following is a specification. i

This invention relates to improvements in cores for then'lamifacture 0f the outer shoes of double tube pneumatic tires. The object of the invention is to provide a core com-- prlslng a plurality of separable segment shaped members whlch whenumted'form an annulus and whichare capable of being collapsed and also longitudinallyextended during the vulcan zlng operation for the purpose of stretching the fabric of the tire shoe during vulcanization.

The invention further contemplates the provision of means for longitudinally extending or expanding the core when desiredand also means-for holding the various seg-,

ment-shaped sections together.

WVith the foregoing and other objects in' view, the invention consists in" the novel construction, combination and arrangement of parts constituting the invention to be hereinafter specifically described and illustrated in the accompanying drawings which form a part hereof wherein is shown the preferred embodiment of "the invention, but

tions and modifications can beresorted to which come within the scope of the matter hereinafter claimed. 4

In the drawings in which similar referparts in the different figures,

Figure 1 is a plan view of a portion of a core embodying the present invention with a portion broken away. v

Fig. 2 is a sectional view of the end of one of the sections.

Fig. 3 is" a similar view of the complemental end of the adjacent section.

Fig. 4; is a fragmentary view of the side of a core illustrating one of the joints between sections.

Fig. 5 is a view partly in section and partly in side elevation of another form of joint employed in the core.

Fig. 6 is atransverse sectional view of a mold with'a core positioned therein .with themembers of the mold separated and in the position which they assume previous to the application of pressure to the mold.

Fig. 7 is .1 view similar toFig. 6 with the;

mold completely closed. I

Fig. 8 is a fragmentary .transverse sectional'view of a portion of the core.

Fig. 9 is a View similar-to. Fig. 6 showing different means for circumferentially expanding or extending the core, and M v Fig. 1O 1s a ring employed in connection with the mold shown in Fig. 9.

The fcorewhich forms the subject matter of the present inventioncomprises a plural1ty.0f separate segment-shaped sections adapted when united to form an anmflus and with means for detachably connecting the various segment-shaped sections together. The core comprises a plurality of sections 1, 2,8, 4', 5 and 6 the outer portions of all of which arefashioned to impart the desired configuration to the interioroft-he tire shoe which is to be manufactured thereon and all the sections are provided. with inwardly extending flanges 7 which are'provided on one side with facial recesseswhich in the assembled condition of the core provide a continuous circumferential channel 30. The inner faces of the flangesa're beveled or inclined for a purpose to be later described. Adapted to be seated in this channel is a locking ring 8 provided at one or more places with threaded openings in which are mounted elevating screws 9. The section 1 constitutes the key section and is made wedge-shapedv so that it may be easily withdrawn inwardly from the finished tire shoe. The'joints between the key section 1 and the two coadjacent sections 2 and 6 are temporarily covered by thin strips of metal 10 which are held in place by the material of the tireshoe during the building thereof. The joints between the remaining sections are all similar and are best illustrated in thereof are approximately conically fash-' ioned or inclined and the end of the section is closed by a plate 13 in the usual manner. The complemental end of the section 3 is provided with a recess 14 the edges of which are inclined at an angle ap roximating the chamfered wall of the pro ection 11. The

recess 14 constitutes a socket the inner or bottom end of which is closed by a plate 15.

The projecting end 11 of the section '2 is adapted to seat 1n the recess 11 and the side wallsof the recess 1-1 to overlap the chamfered parts of the projection 11 so that when The strips 10 of thin channel preferably the segments are united the exterior of the core will present a smooth and even surface on which the tire is built. The core is assembled by uniting the various sections 2,

3, 1, 5 and 6 by inserting the projecting ends 11 of the sections in the various sockets l-L after which the key' section 1 is positioned.

16 of the mold and the locking ring 8 rei moved. The removal of' the locking ring is easily accomplished by rotating the screws 9 which engaging the flanges 7 lift the ring from its seat; The upper half 17 of the mold is then positioned. This section of the moldis provided with an inwardly-extending flange 18 having the inclined face 19 which engages the innerinclined faces of the flanges 7 as the mold members are clamped to-place by means of the ordinary hydraulic press. The various members of the core are forced outwardly or longitudinally extended or expanded to force the tire shoe 20 into engagement with the -walls of the mold thereby stretching the fabric and removing wrinkles and other irregularities in the construction of the same.-

In order to utilize molds already in existence which are not equipped with a flange 18 and are of the construction shown in Fig.

9 and in which the upper mold is denominated by the reference numeral 21 and the lower member by the numeral 22 I employ the spreading ring shown in Fig. 10 comprising a flange 23 which is adapted to seat on the upper face of the upper mold 21 and sheet metal are then in building the tire.

with a downwardly extending annular flange :24. havinga conicallyformed lower end 25 which is adapted to engage the inner inclined faces of the various flanges of the core sections and when forced downwardly by the pressure exerted by the press in which the molds are placed accomplish the same function'as is accomplished where the upper mold sections is provided with the inwardlyextendi'ng flange 18 thereby enabling old molds to be used with this core and also permitting the circumferential expansion or eX- tension of the core therein during the closing of the mold. It will be obvious that the core may be circumferentially-extended due to thetelescopic joints between the various sections and at the same time present a smooth and even surface to the inner face of the shoe. The joints between the key section 1 and the two adjacent sections 2 and 6 and also joints in case of a separation due to the extension of the core in the mold are covered by the thin strips of metal 10 so that a smooth and even surface is imparted to'the interior of the finished tire shoe.

, I claim, A core of ing a plurality of separable segment-shaped sections having inwardly-extending flanges the inner facesofwhich are inclined and the lateral faces provided with grooves, which, in the assembled condition of the sections provide an annular channel, an annular ring insertible in said channel and adapted to hold said sections together during the building up of a tire shoe on said core, wedging means for moving said sections radially outwardly to circumferentially expand said core and covering means applied ever the joints between the contiguous sections to cover the openings between contiguous sections caused by the movement thereof during the expansion of the core.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CLARENCE F. AMES.

the characterdescribed compris- 

